A target rich environment with a guarantee of it being a gun free zone. Add to it the likelihood of the victims resisting or fighting back is very low to non-existent, and these are the results you get.
Most of these kids on these campuses walk around with a thousand bucks of stuff in their possession, even more in their rooms.
Not like back in my college days when all I had was a black-and-white portable TV, a transistor radio (but it did pick up shortwave!) and a crappy dorm fridge. As for walking around money, puh-leeze.